#include<stdio.h>

int main()
{
  int a = 10, b = 5;

  printf("%d+%d = %d\n", a, b, add(a,b));
  printf("%d-%d = %d\n", a, b, sub(a,b));
  printf("%d/%d = %d\n", a, b, div(a,b));

  return 0;
}
